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Containment or hermetically sealed zone


hermetically sealed zone

This technique is used in the removal of friable or non-friable asbestos in which the structure of the material should be changed (for example, if an asbestos-containing ceiling plate needs to be broken). The entire space in which the asbestos-containing material is kept, is hermetically sealed. We can then safely remove the asbestos within this zone.

When to use?

We mainly use a hermetically sealed area (containment) to remove friable asbestos-containing materials. This technique is also appropriate when it is impossible to wind the incubator bags around the pipes in a secure manner, or if we have to cut an asbestos-cement pipe.

How to use?

containment or hermetically sealed zone

The whole work area is hermetically sealed from the outside world. By means of wooden beams or a scaffolding frame, upon which a double-layer of plastic film is applied, we create a hermetically sealed work area. Airlocks for material and staff are connected to the containment area and air mover machines are connected.

Before commencing the works, we conduct a smoke test in order to ensure that the space is completely hermetically sealed.

Working in a hermetically sealed area has certain limitations. We are only allowed to spend 2 hours without interruption in this area. When entering and leaving the area certain procedures need to be respected (decontamination).

With hermetical containment we carry out daily air measurements in order to ensure that the concentration of asbestos fibres in the air is not too high. 

We connect an airlock for people and one for materials to the hermetically sealed area. Extractors ensure a vacuum and ventilation. This way we are able to control the asbestos fibres.

inside view hermetically sealed zone.

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